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Operating Instructions
PLL Synthesized Headphone Radio
© 2004 Sony Corporation
Printed in China
The model number is located on the rear of the left side of the headphone radio
and serial number inside the battery compartment. Record the serial number in
the space provide below. Refer to these numbers whenever you call upon your
Sony dealer regarding this product.
Model No. SRF-HM03V
Serial No.
For customers who purchased this product in the USA
Please register this product on line at
Proper registration will enable us to send you periodic mailings about new
products, services, and other important announcements. Registering your
product will also allow us to contact you in the unlikely event that the
product needs adjustment or modification. Thank you.
You are cautioned that any changes or modifications not expressly approved
in this manual could void your authority to operate this equipment.
If you have any questions about this product, you may call;
Sony Customer Information Services Center 1-800-222-7669 or
Declaration of Conformity
Trade Name:
Responsible Party:
Sony Electronics Inc.
16450 W. Bernardo Dr, San Diego, CA 92127 USA
Telephone Number: 858-942-2230
This device complies with part 15 of the FCC rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
· PLL synthesized tuning 4 band radio.
· Designed for hands-free use.
·A total of 30 stations can be preset, 5 TV stations, 5 WEATHER stations, 15
FM stations and 5 AM stations.
· TV/WEATHER/FM SENS (sensitivity) DX/LOCAL selector for better
· MEGA BASS for dynamic bass sound system.
· Light reflector to reflect car lights at night for your safety.
·Water-resistant body for all weathers operation.
· Operate the unit only on 1.5V DC with one size AAA (R03) battery.
·Avoid exposure to temperature extremes, direct sunlight, moisture, sand, dust or
mechanical shock. Never leave in a car parked under the sun.
· Should any solid object or liquid fall into the unit, remove the battery and have
the unit checked by a qualified personnel before operating it any further.
· In vehicles or buildings, radio reception may be difficult or noisy. Try listening
near a window.
·To clean the casing, use a soft cloth dampened with a mild detergent solution.
Notes on Headphones
Road safety
Do not use headphones while driving, cycling, or operating any motorized
vehicle. It may create a traffic hazard and is illegal in many areas. It can also be
potentially dangerous to play your headphones at high volume while walking,
especially at pedestrian crossings. You should exercise extreme caution or
discontinue use in potentially hazardous situations.
Preventing hearing damage
Avoid using headphones at high volume.
Hearing experts advise against continuous, loud and extended play. If you
experience a ringing in your ears, reduce volume or discontinue use.
Caring for others
Keep the volume at a moderate level. This will allow you to hear outside sounds
and to be considerate to people around you.
Cautions on Water-resistance
This unit is designed so that it can be used with slight exposure to rain, snow and
other forms of moisture, but there are several points on which caution should be
· Do not allow it to come into contact with large amounts of water.
· Do not immerse it in water.
· If water should get on it or if it should fall into water, take it out immediately
and wipe it off with a dry cloth. To prevent the battery from corroding, wipe out
the interior of the battery compartment as follows:
­ Open or close the battery compartment with dry hands in a place without
exposure to any water.
­Wipe off the battery and the inside of the battery compartment. Give special
attention to the contacts so that no water remains on them.
If there is lightning when you are using the unit, take off the headphones
If you have any questions or problems concerning your unit, please consult your
nearest Sony dealer.
The preset stations may be initialized, if a maintenance service is performed.
Please keep a copy of your settings in case you want to preset them again.
Time display: 12-hour system
Frequency range:
Channel step
2 - 13 ch
1 channel
1 - 7 ch
1 channel
87.5 - 108 MHz
0.1 MHz
530 - 1 710 kHz
10 kHz
531 - 1 710 kHz
9 kHz
Headphone type: Dynamic
Power output: 7 mW + 7 mW (at 10 % harmonic distortion)
Power requirements: 1.5V DC, one size AAA (R03) battery
Mass: Approx. 159 g (5.6 oz) incl. a battery
Design and specifications are subject to change without notice.
Installing the Battery
1 Open the battery compartment lid and install one battery (not
When the battery is first installed, "AM 12:00" flashes in the display. Once
the current time is set, the flashing stops. (See "Setting the Clock")
Insert the # side of
the battery first.
Size AAA
× 1
*The attached packing is used to ensure water-resistance for the battery
compartment. Therefore, make sure to close the battery compartment lid
2 To close the lid, press the center of the lid firmly and push it back
to its original position as illustrated.
Battery Life (Approx. hours)
Sony alkaline size AAA (LR03) battery
Sony size AAA (R03) battery
* Measured by JEITA (Japan Electronics and Information Technology Industries
Association) standards.
The actual battery life may vary depending on the circumstance of the unit.
When to replace the battery
You can check the remaining battery power that appears in the display.
The indicators are as follows:
Full strength
Used up. The unit will sound a long beep and then turn off.
Replace the battery with a new one. When you set POWER to
ON after installing the new battery, the indicator changes to
Note on replacing the battery
Do not take more than 5 minutes to replace the battery, otherwise, the clock
setting, preset stations and the AM channel step will be initialized. Should that
happen, reset the functions.
Notes on battery
· Do not charge the dry battery.
· Do not carry the dry battery together with coins or other metallic objects. It can
generate heat if the positive and negative terminals of the battery accidentally
come into contact with metallic objects.
·When you are not going to use the unit for a long time, remove the battery to
avoid damage from battery leakage and corrosion.
"WALKMAN" is a registered trademark of Sony Corporation to represent Headphone Stereo products.
is a registered trademark of Sony Corporation.
Printed on 100% recycled
paper using VOC (Volatile
Organic Compound)-free
vegetable oil based ink.

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Driver Unit
TUNE +*2
compartment lid
Light reflector (L)
This reflector
reflects car lights
at night for your
*1 There is a tactile dot beside volume to show the
direction to turn up the volume.
*2 The TUNE + button has a tactile dot.
Setting the Clock
The clock time display of this unit is a 12-hour system.
When the battery is first installed, "AM 12:00" flashes in the display.
1 Set POWER to OFF to turn off the power.
2 Hold down MEGA BASS/CLOCK for more than 2 seconds
until "AM 12" starts flashing.
3 Press TUNE + or ­ to adjust the hour, then press MEGA BASS/
If you hold down TUNE + or ­, the digit changes rapidly.
"AM 12:00 "= midnight, "PM 12:00 "= noon.
4 Repeat step 3 above to adjust the minute.
":" starts flashing and the clock starts operating.
To set the current time exactly to the second, adjust the minute and then press
MEGA BASS/CLOCK to synchronize with a time signal (such as the
telephone time signal).
If you do not press TUNE + or ­, or MEGA BASS/CLOCK within one minute,
the clock setting mode will be canceled.
Wearing the Headphone
(See fig A)
1 Wear the L side driver unit in your left ear and the R side in your
right ear as illustrated.
2 Adjust the position of the driver units for a comfortable fit.
Changing AM Channel Step
The AM channel step differs depending on areas. The channel step of this unit is
factory-set to 10 kHz. Change the settings as shown below to be able to listen to
the radio.
Channel step
North and South American countries
10 kHz
Other countries
9 kHz
When the AM channel step is changed, only the preset stations on the AM band
will be initialized.
1 Set POWER to OFF to turn off the power.
2 While holding down MODE, hold down TUNE + or ­ for more
than 5 seconds.
The channel step will change and "9" kHz (or "10" kHz) will flash for 3
seconds in the display.
If you proceed to step 2 again, the channel step changes again.
Playing the Radio
-- Manual Tuning
1 Set POWER to ON to turn on the power.
2 If "PRESET" is displayed, press MODE so that "PRESET"
Pressing MODE will switch over between manual tuning mode and preset
tuning mode.
3 Press BAND to select the band.
Each press changes the band as follows:
4 Press TUNE + or ­ to select the desired frequency.
If you hold down TUNE + or ­, the frequency or channel changes rapidly.
When the frequency matches the broadcast frequency, the broadcast will be
5 Adjust the volume using VOL.
To turn off the radio, set POWER to OFF.
Improving Radio Reception
TV/WEATHER/FM: Set TV/WB/FM SENS to LOCAL if interference is
prevalent when radio wave intensity is dramatically stronger.
Under normal conditions, set to DX.
AM: Move around to obtain better reception.
Obtaining Powerful Bass
"MB" appears in the display.
If the sound is distorted, or if you want to reduce the bass tone, press MEGA
BASS/CLOCK again to turn off this function.
The MEGA BASS setting is not canceled even if the radio is turned off.
Presetting your Favorite
-- Preset Tuning
You can preset up to 5 stations each for TV, WEATHER and AM, and 15
stations for FM. Also, you can delete the preset station whether it is factory-set or
preset by yourself.
Presetting a Station
1 Follow steps 1 to 5 in "Playing the Radio" and manually tune in to
the station you wish to preset.
2 Hold down ENTER until the preset number flashes.
If there is a preset number that has no preset station, that preset number
When all the preset numbers are set to certain stations (factory-set), "1"
flashes and "PRESET" appears.
Light reflector (R)
3 Press TUNE + or ­ to select the number you wish to preset, then
press ENTER.
When you select the preset number using TUNE + or ­, "PRESET" appears
if that number has a preset station. If it has no preset station, only the number
flashes and "PRESET" does not appear.
When you press ENTER, the selected preset number lights up in the display.
Example: Display window when you preset FM 90.0 MHz in preset
number 2.
To preset another station, repeat these steps.
To change the preset station, preset a new station. The previous station will
be canceled.
If you do not press TUNE + or ­, or ENTER within one minute, the preset
tuning mode will be canceled.
Tuning in to a Preset Station
1 Set POWER to ON to turn on the power.
2 Press MODE so that "PRESET" and preset number appear.
3 Select the band with BAND.
4 Press TUNE + or ­ to select the desired preset number.
5 Adjust the volume using VOL.
To turn off the radio, set POWER to OFF.
If you hold down MODE for more than 2 seconds, the unit enters the preset
station deleting mode. Press MODE again to return to the previous mode.
Deleting a Preset Station
1 Follow steps 1 and 2 in "Tuning in to a Preset Station".
2 Select the band with BAND.
3 Press TUNE + or ­ to select the preset number to be deleted.
4 Hold down MODE for more than 2 seconds until "PRESET",
dEL" and the preset number flash.
5 While the letters and the preset number are flashing, press
The station set to the preset number just before the deleted station will be
To delete other stations, repeat steps 2 to 5.
If all the preset stations are deleted, "PRESET -" appears in the display.
To cancel deleting, press MODE while "PRESET", "dEL" and the preset number
are flashing.
preset number to
be deleted